Why Your Docker Container Works on Windows but Fails on Linux: The Case-Sensitive Naming Nightmare

Hi Everyone, Have you ever faced that frustrating moment: Your code runs perfectly on your local machine (Windows/macOS), but the moment you containerize it with Docker or deploy it to a Linux server, everything breaks with a cryptic Module not found error? The culprit usually isn't your logic—it’s a "sweet lie" told by your operating system. 1. The Kernel-Level Reality Check The trouble starts with how different Operating Systems handle their File Systems : Windows (NTFS): Microsoft prioritizes user convenience. To Windows, User.service.ts and user.service.ts are semantically the same. Therefore, NTFS is designed to be Case-Insensitive . Linux (Ext4/XFS): The philosophy of Linux (and Unix) is absolute precision. In ASCII, 'U' (65) and 'u' (117) are two completely different entities. Linux treats User.ts and user.ts as two distinct files that can coexist in the same folder. 2. The Docker "Trap" on Local Machines Docker on Windows or macOS doesn't actually run directly on those kernels.